Account for the following:(i) Schottky defects lower the density of related solids.(ii) Conductivity of silicon increases on doping it with phosphorus.

Q: 03. How can we determine of the band-gap of gemanium from electrical measurements?

A: Band gap of semiconductor like germanium can be determined by the study of the Variation of its…

Q: Without consulting any source other than a periodic table, what relative level of toughness would…

A: Ti -Titanium is the transition metal having atomic number 22.  Ti can loses its two electrons to…

Q: estimate the fraction of electrons above fermi level in sodium and copper at room temperature

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Q: Account for the relative band gap energies of semiconductors interms of periodic trends?

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Q: Determine the expected crystal structure including the ion positions of the hypothetical salt AB2,…

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Q: Boron nitride (BN) is made by the reaction of boron trichloride with ammonia.(a) Write a balanced…

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Q: The key reaction (unbalanced) in the manufacture of syn-thetic cryolite for aluminum electrolysis is…

A: The balanced chemical equation is as follows, The moles of Na3AlF6 is calculated from aluminium…

Q: What is the mass percent of silicon in the mineral orthoclase (KAlSi3O8)?

A: Mass percentage = mass of the atommass of compound ×100%

Q: Strontium titanate (SrTiO3) is another wide bandgap semiconductor that has been investigated for use…

A: For H2|H+ electrode the value of standard reduction potential is 0V. For O2|H2O electrode the value…

Q: On

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Q: Diffusion does not have an effect on______. a) Doping in semiconductors b) Production of alloys c)…

A: Diffusion doesn't not have an effect on heat treatment of metals .  In production of alloy the metal…

Q: Would you expect the alloy PdB0.15 to be a substitutional alloy or an interstitial alloy?

A: Please find below the pic to understand the difference between  a substitutional alloy and an…

Q: Draw the structural formula of bis(dimethylglyoximato)nickel(II) and describe the type of…

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Q: What is the significance of leaching in the extraction of aluminium ?

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Q: ive short answers to the following. a. What is the correlation of ionization potential and atomic…

A: a. As we move from left to right atomic number increases because electron getting added but…

Q: ite form of iron has fcc crystal lattice structure,whereas its alpha form has bcc crystal lattice…

A: For a Face-Centred Cubic lattice:  4r=2a where r is the radius of the atom and a is the edge length.…

Q: Properties of Liquids and IMF.   Give a brief explanation

A: There are three main states of matter - solid, liquid, and gases. The liquid is a state of matter in…

Q: why does enrgy have to be supplied to a chemical in order to break the IMFs between the molecules in…

A: In any chemical reaction reactants are converted into products.

Q: You would like to select a material for electrical contacts in an electrical switching device which…

A: The materials that have to be used for electrical contacts in an electrical switching device must…

Q: 6. Draw a chain silicate structure containing four tetrahedra. Show the numbers of Si atoms, O…

A: Basic unit of silicate, [SiO4]4- tetrahedron, can form single and double chains and sheets.  The…

Q: In how many allotropic forms does arsenic exists?

A: Allotropes of an element are forms of the same element with different physical and chemical…

Q: Discuss the following sentences: 7- The role of PbO in glass.

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Q: What is rock salt? Mention its colour and the reason due to which it has this colour ?

A: Salt is a mineral consisting predominantly of sodium chloride, a chemical element that belongs to a…

Q: 3 Describe the solid state structures of (a) the alkali metals and (b) the alkali metal chlorides,…

A: Answer is :

Q: Describe the nature of electrical conduction in (a) germa- nium doped with indium and (b) cadmium…

A: (a) Germanium doped with indium: When germanium is doped with indium, it creates new levels at the…

Q: Given Cs (262 pm), TI (171 pm), and B (88 pm) with their noted atomic radii, which atom is most…

A: Interstitial impurity occurs when an impurity atom occupies an octahedral hole or tetrahedral hole…

Q: What is the name of the reference that contains the topic of synthesis and characterization of…

A: Liquid crystals are the state of matter that can be defined as the intermediate form between solid…

Q: Account for the fact that LiF and CsI have low solubility in water whereas LiI and CsF are very…

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Q: Interpret the variation, including the overall trend across the 3d series, of the following values…

A: The total energy required to break the crystal lattice of a salt into its constituent ions is known…

Q: Magnesium hydride possesses a rutile lattice. (a) Sketch a unit cell of rutile. (b) What are the…

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Q: The nitride ceramics AIN, GaN, and InN are all semiconductors used in the microelectronics industry.…

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Q: Pyrite (FeS2) can be leached by oxygen in sulfuric acid solution to form ferric sulfate. Write the…

A: A balanced reaction is the reaction in which equal number of atoms are present on both the sides of…

Q: discuss the importace and methods of solid liquid separation processes of hydro metallurgy

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Q: What is OFHC copper? Describe briefly its processing and comment on the applications of the metal…

A: alloys are the metallic  substance composed  of two or more elements as either a compound or…

Q: When aluminum replaces up to half of the silicon atomsin SiO2, a mineral class called feldspars…

A: The feldspar is a mixture of minerals of metals. The ratio of Al : Si is 0.5. So one Al ion per…

Q: A sample of an impure iron ore is believed to be approximately 55% w/w Fe. The amount of Fe in the…

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Q: Give answers of the following. a. Which allotropic forms of carbon are conductor and which are…

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Q: What is the function of SiO2 in the metallurgy of copper?

A: Metallurgy is a process in which metals are separated from its ore.

Q: 7. The enthalpy of formation of Frenkel defects (kJ mol) is AgCI, 140, AgBr, 109, AgI, 58. The…

A: Frenkel effect is caused if some of the ions of an ionic compound is missing from its crystal…

Q: 5. Describe the crystal structure of BaFei2O19. What is the relation between permeability with…

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Q: The U.S. Department of Energy has set the benchmark of 6% H by weight for an acceptable hydrogen…

A: given materials : NaAlH4, LiAlH4, LaNi5H6,  TiFeH2

Q: What is linkage isomerisation and why can it be important?

A: Linkage isomers are two or more coordination compounds in which the donor atom of at least one of…

Q: (a) What are the different oxidation states exhibited by the lanthanoids? (b) Write two…

A: (a) What are the different oxidation states exhibited by the lanthanoids? In the lanthanide series,…